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Towards elevated perfluorooctanoic acid (PFOA) enrichment in water: Sequential liquid-liquid extraction pretreatment for ion chromatography detection

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Chemosphere 2024年 358卷 142227页

作者： Yang, Yang He, Huan Chen, Yuheng Chen, Baiyang Esfahani, Ehsan Banayan Mohseni, Madjid Xu, Nan Nesterenko, Pavel 518055 China Department of Chemical & Biological Engineering University of British Columbia Vancouver BCV6T 1Z3 Canada Key Laboratory for Heavy Metal Pollution Control and Reutilization School of Environment and Energy Peking University Shenzhen Graduate School Shenzhen518055 China Department of Chemistry Lomonosov Moscow State University Vorob'evy Gory GSP-3 Moscow119899 Russia

The widespread detection of perfluorooctanoic acid (PFOA) in the environment has raised significant concerns. The standard PFOA analytical method relies on expensive solid-phase extraction (SPE) and liquid chromatography tandem mass spectrometry (LC-MS/MS) instruments, making routine use prohibitive. We herein proposed a cost-effective yet novel enrichment method for determining PFOA at ng L−1 level. This method entailed a two-step sample preparation process: firstly, PFOA was extracted and enriched using a forward-extraction under acidic conditions, followed by a backward-extraction and enrichment step utilizing alkaline water. The enriched samples were subsequently subjected to a common ion chromatography (IC). Results reveal that maintaining a forward-extraction pH below its pKa value (2.8) is essential, as protonated PFOA proves effective in enhancing the enrichment factor (EF). The challenge lied in driving PFOA from forward-extractant to aqueous backward-extractant due to the decreased hydrophobicity of deprotonated PFOA (log Kow2 = 1.0). In addition, we found that evaporating forward-extractant with alkaline backward-extractant (containing 5% methanol) reduced potential analytical uncertainties associated with PFOA evaporation and sorption. Under optimal conditions, the method achieved a detection limit of 9.2 ng L−1 and an impressive EF value of 719. Comparison with SPE-LC-MS/MS confirmed the proposed method as a promising alternative for PFOA determination. Although initially targeted for PFOA, the novel methodology is likely applicable to preconcentration of other poly-fluoroalkyl substances. © 2024 Elsevier Ltd

关键词： Ion chromatography

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A Prediction Index of Volatile Organic Compounds pollution Conditions in Chemical Industry Park Based on Atmospheric Stability

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SSRN 2023年

作者： Chen, Xi Huang, Bo Li, Mei Xiao, Runhui Cai, Mingfu Zhou, Zhihua Ma, Song Gao, Wei Zhou, Zhen Institute of Mass Spectrometry and Atmospheric Environment Guangdong Provincial Engineering Research Center for On-line Source Apportionment System of Air Pollution Jinan University Guangzhou China Guangzhou Hexin Instrument Co. Ltd Guangzhou China Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality Guangzhou China Guangdong Province Engineering Laboratory for Air Pollution Control Guangdong Provincial Key Laboratory of Water and Air Pollution Control South China Institute of Environmental Sciences MEE Guangzhou China Shenzhen Ecological and Environmental Monitoring Center of Guangdong Province Shenzhen China

Volatile organic compounds (VOCs), as common precursors of ozone (O3) and fine particulate matter (PM2.5), are a focus of air pollution prevention and control. Furthermore, with the rapid development of industry, industrial sources have become the largest source of anthropogenic VOCs emissions, leading to economic development while causing great harm to the environment. It is becoming meaningful to efficiently predict the future total volatile organic compounds (TVOC) pollution conditions in chemical industry parks (CIPs), which can assist managers in carrying out corporate emission management in advance. In this study, TVOC monitoring data and meteorological data from January 1, 2022, to December 31, 2022, were used to innovatively construct the TVOC pollution index. This index comprehensively considers the atmospheric stability and localized horizontal diffusion conditions and can quickly and accurately predict the variation in the TVOC in a CIP in the next 7 days. In addition, we used synoptic weather patterns and backward trajectory analysis to explore the mechanism of VOCs pollution formation in a CIP. The results show that the combined influences of a westerly wind pattern, temperatures above 30°C, a subtropical high pressure system, more upwind pollutants, and the horizontal and vertical diffusion conditions in the CIP were unfavorable, leading to VOCs pollution. © 2023, The Authors. All rights reserved.

关键词： Volatile organic compounds

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Estimating the value of a statistical life in China: A contingent valuation study in six representative cities

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Chinese Journal of Population,Resources and environment 2023年第4期21卷 269-278页

作者： Chaoji Cao Xinke Song Wenjia Cai Yichao Li Jianhui Cong Xueying Yu Mengzhao Gao Can Wang Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System ScienceTsinghua UniversityBeijing100084China Center for Healthy Cities Institute for China Sustainable UrbanizationTsinghua UniversityBeijing100084China Tsinghua Urban Institute Tsinghua UniversityBeijing100084China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China Center for Statistical Science Tsinghua UniversityBeijing100084China Department of Industrial Engineering Tsinghua UniversityBeijing100084China School of Economics and Management Shanxi UniversityTaiyuan030000China School of Economics and Management Beihang UniversityBeijing100191China Beijing Advanced Innovation Center for Big Data-based Precision Medicine Beihang UniversityBeijing100191China Key Laboratory of Big Data-Based Precision Medicine(Beihang University) Ministry of Industry and Information TechnologyBeijing100191China

The value of a statistical life(VSL)is a crucial tool for monetizing health *** explore the VSL in China,this study examines people’s willingness to pay(WTP)to reduce death risk from air pollution in six representative cities in China based on face-to-face contingent valuation interviews(n=3936)from March 7,2019 to September 30,*** results reveal that the WTP varied from CNY 455 to 763 in 2019(USD 66-111),corresponding to a VSL range of CNY 3.79-6.36 million(USD 549395-921940).The VSL in China in 2019 is estimated to be CNY 4.76 million(USD 689659).The statistics indicate that monthly expenditure levels,environmental concerns,risk attitudes,and assumed market acceptance,which have seldom been dis‐cussed in previous studies,significantly impact WTP and *** findings will serve as a reference for ana‐lyzing mortality risk reduction benefits in future research and for policymaking.

关键词： Air pollution Contingent valuation method Willingness to pay Value of a statistical life China

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Hierarchically Porous Carbon Derived from Pore Remodeling of Waste Polymeric Membranes for High-Efficiency Adsorption Applications

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SSRN 2022年

作者： Hou, Zhiang Lan, Huachun Zhu, Kai An, Xiaoqiang Liu, Huijuan Qu, Jiuhui Center for Water and Ecology Tsinghua University State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China School of Environmental Science and Engineering Suzhou University of Science and Technology Suzhou215009 China

Herein, the waste-derived carbon (AC-KOH) with multimodal pore structures was successfully synthesized by thermally remodeling the pores of waste hollow fiber membranes collected from sewage-treatment plants. Mechanism study revealed that KOH etching in the original pores of PVDF film leaves micropores, while the development of meso-macropores is induced by PET liner pyrolysis and subsequent re-crosslinking and cyclization surrounding KOH. The synergism of macro-meso-micropores enabled the fast diffusion of molecules from the bulk solution to adsorption sites, thereby AC-KOH exhibited fast adsorption kinetics for removing four types of phenolic pollutants and small dye molecules (molecular weight © 2022, The Authors. All rights reserved.

关键词： Adsorption

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Cattle manure biochar and earthworm interactively affected C02 and N20 emissions in agricultural and forest soils:Observation of a distinct difference

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环境科学与工程前沿 2022年第3期16卷 141-153页

作者： Xiaoqiang Gong Jinbiao Li Scott X.Chang Qian Wu Zhengfeng An Chengpeng Huang Xiangyang Sun Suyan Li Hui Wang Department of Renewable Resources University of AlbertaEdmontonAlberta T6G 2E3Canada College of Forestry Beijing Forestry UniversityBeijing 100083China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Department of Renewable Resources University of AlbertaEdmontonAlberta T6G 2E3Canada Co-Innovation Center for Sustainable Forestry in Southern China Nanjing Forestry UniversityNanjing 210037China Department of Renewable Resources University of AlbertaEdmontonAlberta T6G 2E3Canada Key Laboratory of Grassland Resources of the Ministry of Education and Key Laboratory of Forage Cultivation Processing and High Efficient Utilization of the Ministry of AgricultureCollege of GrasslandResources and EnvironmentInner Mongolia Agricultural UniversityHohhot 010011China State Key Laboratory of Subtropical Silviculture Zhejiang A&F UniversityLin'an 311300China College of Forestry Beijing Forestry UniversityBeijing 100083China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

The application of manure-derived biochar offers an alternative to avoid the direct application of manure to soil causing greenhouse gas *** fauna,especially earthworms,can markedly stimulate carbon dioxide(CO2)and nitrous oxide(N2O)emissions from *** study therefore investigated the effect of cattle manure biochar(added at rates of 0,2％,or 10％,coded as BC0,BC2 and BC10,respectively)application,with or without earthworm Aporrectodea turgida,on emissions of CO2 and N2O and changes of physic-chemical properties of agricultural and forest soils in a laboratory incubation *** BC10 treatment significantly enhanced cumulative CO2 emissions by 27.9％relative to the untreated control in the agricultural *** the contrary,the BC2 and BC10 treatments significantly reduced cumulative CO2 emissions by 16.3％-61.1％and N2O emissions by 92.9％-95.1％compared to the untreated control in the forest *** addition of earthworm alone significantly enhanced the cumulative CO2 and N2O fluxes in agricultural and forest *** CO2 and N2O fluxes were significantly increased when BC2 and BC10 were applied with earthworm in the agricultural soil,but were significantly reduced when BC10 was applied with earthworm in the forest *** study demonstrated that biochar application interacted with earthworm to affect CO2 and N2O emissions,which were also dependent on the soil type *** study suggests that manure biochar application rate and use of earthworm need to be carefully studied for specific soil types to maximize the climate change mitigation potential of such management practices.

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Seasonal variation characteristics of hydroxyl radical pollution and its potential formation mechanism during the daytime in Lanzhou

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Journal of environmental Sciences 2020年第9期32卷 58-64页

作者： Guoying Wang Shiming Jia Ruihong Li Shangrong Ma Xuefu Chen Zhijun Wu Gaofeng Shi Xiuli Niu School of Petrochemical Engineering Lanzhou University of TechnologyLanzhou 730050China State Key Joint Laboratory of Environment Simulation and Pollution Control(Peking University) College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China Gansu Food Inspection and Research Institute Lanzhou 730030China

Hydroxyl free radicals(OH radicals) play the main role in atmospheric chemistry and their involving reactions are the dominant rate determining step in the formation of secondary fine particulate matter and in the removal of air pollutants from the *** this paper,we studied the seasonal variation characteristics of OH radicals during the daytime in Lanzhou and explored the potential formation mechanism of high concentration OH *** found that the OH radicals in four seasons was 2.7×106,2.6×106,3.1×106, and2.2×106 cm-3,*** the rainfall was concentrated in summer,the wet deposition had a significant effect on removing OH *** the four pollutants(including ozone(O3),volatile organic compounds(VOCs),nitrogen dioxide(NO2) and fine particulate matter(PM2.5)),the variation of OH radicals were closely related to ozone concentration especially in spring and *** autumn,the correlation between PM2.5 and OH radicals were the closest among the observing pollutants and its formation mechanism was different conventional regeneration *** Event 1,high concentration of ozone was the main source of OH radicals;under the high humidity condition,except for ozone,the multiple factors including VOCs,NO2 and PM2.5 interplayed and leaded to the Event 2.

关键词： pollution ozone radicals

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Pyrite Coupled with Steel Slag to Enhance Simultaneous Nitrogen and Phosphorus Removal in Constructed Wetlands

SSRN

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SSRN 2023年

作者： Liu, Ying Liu, Xiao-Hui Wang, Hong-Cheng Li, Zhi-Ling Liang, Bin Sun, Yi-Lu Cheng, Hao-Yi Lu, Shao-Yong Wang, Ai-Jie State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Harbin150090 China School of Civil and Environmental Engineering Harbin Institute of Technology Shenzhen Shenzhen518055 China State Key Laboratory of Environmental Criteria and Risk Assessment National Engineering Laboratory for Lake Pollution Control and Ecological Restoration Chinese Research Academy of Environmental Sciences Beijing100012 China Key Laboratory of Environmental Biotechnology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China

FeS2-based constructed wetland has garnered increasing interest as an efficient and eco-friendly method for nitrogen removal from carbon limitation wastewater. However, large-scale application is limited due to low nitrogen and phosphorus simultaneous removal performance, slow growth rate of autotrophic denitrifiers and high effluent acidity. This study proposes a novel autotrophic denitrification constructed wetland by coupling with pyrite and steel slag (PTCW). The results showed that steel slag addition in PTCW increased total nitrogen removal by 40% ~ 54%. The higher removal of total phosphorus was mainly attributed to the strong substrate adsorption and metal ions precipitation, which was removed at the pyrite and steel slag layer. The genes involved in denitrification, glycolysis, oxidative phosphorylation and sulfur oxidation were notably enriched in PTCW, indicating the increasing contribution of FeS2-based autotrophic denitrification coupled with steel slag to NO3− removal. The XPS analysis identified the formation of SO42−, S2−, S0, and Fe(Ⅲ) on the pyrite surface in PTCW. S0 formation and sulfate reducing bacteria enrichment in PTCW were all promoted due to the coupling of pyrite and steel slag, which also maintained higher NO3− removal efficiency. Thiobacillus was specifically enriched in PTCW due to steel slag addition. The toxicity effect of pyrite on root tip can be alleviated by steel slag, which was conducive to nutrients assimilation by roots. The findings of this study provide novel insights into the molecular mechanism of carbon, nitrogen, and sulfur metabolism in pyrite-steel slag based CWs. © 2023, The Authors. All rights reserved.

关键词： Pyrites

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Decarbonization potential of Chinese PHEVs: Impact of increased battery range, power mix, and usage patterns

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Energy 2025年 331卷

作者： Yinan Zhao Fang Wang Shaojun Zhang Ye Wu Jiming Hao State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China Key Laboratory of Sources and Control of Air Pollution Complex Ministry of Ecology and Environment Beijing 100084 China Beijing Laboratory of Environmental Frontier Technologies School of Environment Tsinghua University Beijing 100084 China

Climate change mitigation requires profound decarbonization of the transportation sector. As a transitional technology bridging internal combustion engine vehicles (ICEVs) and battery electric vehicles (BEVs), plug-in hybrid electric vehicles (PHEVs) play a crucial role. This study evaluates the life-cycle CO 2 emissions of PHEVs in China from 2015 to 2022, with particular focus on key factors of increased battery range, decarbonization of the power mix, and variations in electric utility factors. During the study period, PHEV battery capacity demonstrated significant growth: from 10.3–14.2 kWh to 13–20 kWh for short-range models, while long-range models with 30–40 kWh batteries emerged. Our analysis reveals that while larger battery capacities increase production-related emissions, they enhance the regulatory UF, thereby reducing well-to-wheel (WTW) CO 2 emissions. For typical Chinese PHEV models (50–220 km AER in 2022), cradle-to-grave (C2G) CO 2 emissions showed limited sensitivity to AER variations (<5 gCO 2 /km). However, the gap between regulatory and real-world UF, primarily driven by charging behavior, can significantly impact decarbonization outcomes (15–25 gCO 2 /km). Notably, PHEVs demonstrated a 40–50 gCO 2 /km reduction in C2G missions compared to ICEVs, while maintaining a 30–40 gCO 2 /km gap relative to BEVs currently. With further improvement in efficiency, UF increases, material and grid decarbonization, PHEVs are estimated to achieve ∼110 gCO 2 /km C2G missions by 2030. These findings emphasize the need for optimizing charging infrastructure and policy adjustments to align with user behavior, thereby maximizing the decarbonization potential of PHEVs.

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International Multilateral Public Climate Finance Dataset from 2000 to 2023

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Scientific data 2025年第1期12卷 952页

作者： Shuting Fan Can Wang Hanying Zhong Xinyang Dong Kangxin An State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC) School of Environment Tsinghua University Beijing 100084 China. State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC) School of Environment Tsinghua University Beijing 100084 China. canwang@***. Institute for Carbon Neutrality Tsinghua University Beijing 100084 China. canwang@***.

International multilateral public climate finance plays a key role in the global climate financing landscape, yet the availability of a comprehensive, publicly accessible, and transparent database remains inadequate. This study establishes an international multilateral public climate finance database covering the period from 2000 to 2023. The primary objective is to identify and track climate-related projects and their funding flows supported by major multilateral development finance institutions (MDFIs) and multilateral climate funds (MCFs). Using a machine learning model MLCF-BERT (Multilateral Climate Finance BERT), we extracted and classified climate mitigation and adaptation-related projects from project-level data, creating a climate finance database containing detailed information on funding sources, institutions, project types, recipient countries, financing amounts, and financing types. This database provides valuable insights into the distribution and trends of international climate finance, offering data support for climate finance policies and decision-making.

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Simultaneous hydrogen production with photo reforming of lactic acid over MXene derived MoS_(2)/TiO_(2)/Ti_(3)C_(2)nanowires

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Chinese Journal of Catalysis 2025年第4期71卷 234-245页

作者： Seemal Mansoor Zixu Hu Yuxin Zhang Muhammad Tayyab Mazhar Khan Zeeshan Akmal Liang Zhou Juying Lei Muhammad Nasir Jinlong Zhang Key Laboratory for Advanced Materials Shanghai Engineering Research Center for Multi–media Environmental Catalysis and Resource UtilizationJoint International Research Laboratory of Precision Chemistry and Molecular EngineeringFeringa Nobel Prize Scientist Joint Research CenterSchool of Chemistry and Molecular EngineeringEast China University of Science&TechnologyShanghai 200237China National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical ProcessEast China University of Science and TechnologyShanghai 200237China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150090HeilongjiangChina Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China Institute of Materials Research Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055GuangdongChina COMSATS Univ Islamabad Interdisciplinary Res Ctr Biomed Mat IRCBMLahore CampusLahore 54000Pakistan

Developing efficient photocatalysts to address collaborative energy and environmental crises still faces significant *** this report,we present a highly efficient MXene–based photocatalyst,which is combined with MoS_(2)nano patches and TiO_(2)/Ti_(3)C_(2)(TTC)nanowires through hydrothermal *** all the composites tested,the optimized photocatalyst gave a remarkable H_(2)and revolving polylactic acid(PLA)into pyruvic acid(PA).Achieving a remarkable H_(2)evolution rate of 637.1 and 243.2μmol g^(−1)h^(−1),in the presence of TEOA and PLA as a sacrificial reagent under UV-vis(λ≥365 nm)light *** improved photocatalytic activity is a result of the combination of dual cocatalyst on the surface of TTC photocatalyst,which create an ideal synergistic effect for the generation of PA and the production of H_(2)*** MoS_(2)TiO_(2)/Ti_(3)C_(2)(MTT)composite can generate more photoexcited charge carriers,leading to the generation of more active radicals,which may enhance the system's photocatalytic *** work aims at demonstrating its future significance and guide the scientific community towards a more efficient approach to commercializing H_(2)through photocatalysis.

关键词： Photo reforming Polylactic acid Hydrogen evolution Lactic acid Pyruvic acid

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